The contact's granddaughter owns a 2020 Tesla Model 3. The contact stated while her granddaughter was reversing, the rearview camera failed to turn on, causing the rear end of the vehicle to crash into a cement post. The contact was unsure whether there was a warning light illuminated. There were no injuries sustained. A police report was filed. The vehicle was towed to a Tesla-certified autobody mechanic but was not diagnosed or repaired. The vehicle was then towed to the contact's residence. The contact later received notification of NHTSA Campaign Number: 21V00D000 (Electrical System, Visibility, Back Over Prevention) however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the failure but did not provide any assistance. The vehicle was not diagnosed or repaired. The failure mileage was approximately 400. VIN tool confirms parts not available.